Air heating apparatus



FIG. 1 is a top perspective view of an air heating apparatus showing the new design;

FIG. 2 is a right-side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

In the drawings, the broken lines depict unclaimed subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for an air heating apparatus, as shown and described. 